package com.yahoo.weather;

public class AsciiUtils {
	private static final String PLAIN_ASCII =
		      "AaEeIiOoUu"    // grave
		    + "AaEeIiOoUuYy"  // acute
		    + "AaEeIiOoUuYy"  // circumflex
		    + "AaOoNn"        // tilde
		    + "AaEeIiOoUuYy"  // umlaut
		    + "Aa"            // ring
		    + "Cc"            // cedilla
		    + "OoUu"          // double acute
		    ;

    private static final String UNICODE =
		     "\u00C0\u00E0\u00C8\u00E8\u00CC\u00EC\u00D2\u00F2\u00D9\u00F9"             
		    + "\u00C1\u00E1\u00C9\u00E9\u00CD\u00ED\u00D3\u00F3\u00DA\u00FA\u00DD\u00FD" 
		    + "\u00C2\u00E2\u00CA\u00EA\u00CE\u00EE\u00D4\u00F4\u00DB\u00FB\u0176\u0177" 
		    + "\u00C3\u00E3\u00D5\u00F5\u00D1\u00F1"
		    + "\u00C4\u00E4\u00CB\u00EB\u00CF\u00EF\u00D6\u00F6\u00DC\u00FC\u0178\u00FF" 
		    + "\u00C5\u00E5"                                                             
		    + "\u00C7\u00E7" 
		    + "\u0150\u0151\u0170\u0171" 
		    ;

    // private constructor, can't be instanciated!
    private AsciiUtils() { }

    // remove accentued from a string and replace with ascii equivalent
    public static String convertNonAscii(String s) {
       if (s == null) return null;
       StringBuilder sb = new StringBuilder();
       int n = s.length();
       for (int i = 0; i < n; i++) {
          char c = s.charAt(i);
          int pos = UNICODE.indexOf(c);
          if (pos > -1){
              sb.append(PLAIN_ASCII.charAt(pos));
          }
          else {
              sb.append(c);
          }
       }
       return sb.toString();
    }
}
